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Method of manufacturing resin kneaded product

a technology of resin and kneaded products, which is applied in the direction of transportation and packaging, mixing, rotary stirring mixers, etc., can solve the problems of difficult to obtain limited extrusion conditions, and difficulty in obtaining a desired extrusion amount, so as to suppress the venting effect and increase the extrusion amount of material

Inactive Publication Date: 2015-08-18
MITSUBISHI CHEM CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

The invention provides a method for manufacturing a resin kneaded product that helps increase the amount of material that can be extruded while preventing the formation of bubbles or unmelted material at the opening.

Problems solved by technology

However, there are many cases in which the amount of the material entering into the supply section of a twin screw extruder (the amount that enters into a twin screw extruder) limits the extrusion amount when a material containing a large amount of fine powder with a small bulk specific gravity or the like is extruded.
However, the effect thereof is not sufficient in the case of a fine powder that is a significantly fine particle, has a small bulk specific gravity, and is easily fluidized although a compactor is used, and thus it is difficult to obtain a desired extrusion amount.
As a result, the operation can only be performed in a limited range of extrusion conditions.
However, the extruder can only exert the ability which is much lower compared to the extrusion amount obtained by compressing and melting the material primarily by the mechanical shear heat which is the original function of a twin screw extruder.

Method used

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  • Method of manufacturing resin kneaded product

Examples

Experimental program
Comparison scheme
Effect test

example 1-1

Preparation of Modifier (c) for Thermoplastic Resin

[0075]Into a separable flask equipped with a thermometer, a nitrogen inlet tube, a cooling tube, and a stirrer, 225 parts of ion exchanged water, 2.5 parts of sodium dodecylbenzenesulfonate and 0.0002 part of iron (II) sulfate as an emulsifier, 0.0006 part of disodium ethylenediaminetetraacetate, and 0.48 part of ascorbic acid were introduced, and the inside of the flask was purged with nitrogen. Subsequently, the internal temperature of the flask was raised to 73° C., and a monomer mixture of 0.2 part of cumene hydroperoxide as a polymerization catalyst, 98 parts of isobutyl methacrylate containing 1.0 part of n-octyl mercaptan as a chain transfer agent, and 2 parts of n-butyl acrylate was added thereto dropwise over 1 hour. Further, the resultant was held for 1 hour at the same temperature to obtain an alkyl (meth)acrylate-based polymer latex. The mass average molecular weight of this latex was 30,000.

[0076]The latex was cooled to...

example 2-1

[0094]Example 2-1 was performed in the same manner as Example 1-1 except that the screw block in the kneading section A was constituted by R1·R1·R1·R1·R1·R1 (order close to the supply port 1 from the left), and L1=6 and L2=6. The operative conditions and the evaluation results are presented in Table 2 and Table 3, respectively.

example 3-1

[0095]Example 3-1 was performed in the same manner as Example 1-1 except that L2=10. The operative conditions and the evaluation results are presented in Table 2 and Table 3, respectively.

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Abstract

Provided is a method of manufacturing a resin kneaded product in which an extrusion amount of a material can be increased and by which vent-up at an opening can be suppressed while spouting out of an unmelted material at the opening can be suppressed. A method of manufacturing a resin kneaded product includes kneading a material containing an additive (a) and a thermoplastic resin (b) using a twin screw extruder, in which the twin screw extruder is equipped with a supply port, a discharge port, an opening present between the supply port and the discharge port, a kneading section A present between the supply port and the opening, and a kneading section B present between the opening and the discharge port, a ratio L1 (La / D) of a length La of the kneading section A to a screw diameter D satisfies L1≧3, and the material is kneaded in the kneading section A without being completely filled and the material is also kneaded in the kneading section B.

Description

[0001]This application is a National Stage of PCT / JP13 / 052708 filed Feb. 6, 2013 and claims the benefit of JP 2012-024002 filed Feb. 7, 2012.TECHNICAL FIELD[0002]The present invention relates to a method of manufacturing a resin kneaded product containing an additive.BACKGROUND ART[0003]In recent years, techniques to melt-knead functional additives have been investigated for the purpose of imparting various functions to various kinds of thermoplastic resins. Many of those functional additives are inorganic fillers or organic additives having a significantly high melting point or decomposition temperature and thus these do not melt at a normal extrusion temperature. It is desirable for such additives which do not melt at the time of extrusion to be in a high dispersion state in order to exert higher performance, and thus the shape thereof tends to be miniaturized, that is, finely pulverized.[0004]A twin screw extruder can favorably mix and disperse many materials and discharge in a s...

Claims

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Application Information

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Patent Type & Authority Patents(United States)
IPC IPC(8): C08L33/10B01F7/00C08L25/06C08L23/12B29B7/00B29C47/38B29B7/84B29B7/48B29B7/60B29C47/40B29C47/94B29C47/76B29C47/60B29B9/06B29C48/395B29C48/405B29C48/41B29C48/67B29C48/76B29C48/95
CPCB01F7/00975B29B7/002B29B7/482B29B7/603B29B7/84B29C47/38C08L23/12C08L25/06C08L33/10B01F2215/0049B29B9/06B29C47/40B29C47/6056B29C47/766B29C47/94B29C48/625B29B7/48B29B7/60B29C48/57B29C48/766B29C48/41B29C48/95B29C48/405B29C48/395B01F27/2322B01F2101/2805
Inventor MATSUI, YUUKIKIURA, MASAAKIOOKUBO, SHOUGOKAWABE, SADAHARU
Owner MITSUBISHI CHEM CORP